Bare Stem Butterfly Valve

A bare stem butterfly valve is a quarter-turn rotary valve supplied without an operator, hand lever, or gearbox, featuring a standardized top mounting flange and bare drive stem engineered specifically for direct mounting of manual gears, pneumatic actuators, or electric actuators. Constructed in wafer, lug, or flanged body profiles, it provides a highly customizable base valve platform that allows distributors, valve automation centers, and system integrators to retro-fit custom actuation packages based on field requirements. Conforming to standards like ISO 5211 (for actuator mounting pad dimensions), API 609, and EN 593, these versatile valves are primary specifications in automated process control skids, water treatment plants, and industrial HVAC projects, allowing automation engineers to streamline inventory and actuation assembly by importing certified bare stem butterfly valves directly from premier manufacturers in China via our advanced B2B commercial platform.